重组人脂联素融合蛋白在大肠埃希菌BL21中的表达

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目的在大肠埃希菌BL21中对构建的重组人脂联素质粒pET-32a(+)/AP进行诱导表达,并对产物进行纯化、鉴定。方法将pET-32a(+)质粒和重组pET-32a(+)/AP质粒转化到大肠埃希菌BL21中进行诱导表达,建立表达体系,筛选高表达的克隆子,用不同诱导时间和不同异丙基.p—D.硫代半乳糖苷诱导浓度确定最佳诱导条件,用Ni抖金属层析柱进行蛋白亲和层析,对纯化蛋白进行浓缩,蛋白质印迹鉴定所诱导的蛋白。结果得到分子量为43kD的新生蛋白,经蛋白质印迹鉴定为重组脂联素融合蛋白。结论将重组pET-32a
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